Is UGL safe to use INSIDE a block walled cistern
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Thank you for your question and for considering DRYLOK Fast Plug from UGL for your project. DRYLOK Fast Plug can be used in many different way including inside a cistern. To complete the project we recommend waterproofing the inside of the cistern with DRYLOK Powdered Waterproofer (Lowe's item # 759967). If you have any other questions, comments or would like to provide us feedback, you can reach our Technical Service Team at 1-800-845-5227 or by email at ugllabs@ugl.com.
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